Checked Exceptions
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Checked Exceptions are a type of exception in Java that are required to be handled by the programmer. This means that the programmer must either catch the exception and handle it, or declare the method as throwing the exception. Checked Exceptions are used to indicate errors that are likely to occur at runtime and that the programmer should be aware of. Some examples of Checked Exceptions include file not found exceptions, input/output exceptions, and SQL exceptions.
Difference between Checked and Unchecked Exceptions
The main difference between Checked and Unchecked Exceptions is that Checked Exceptions are required to be handled by the programmer, while Unchecked Exceptions are not. Unchecked Exceptions are typically used to indicate errors that are not likely to occur at runtime, or that the programmer cannot reasonably be expected to handle. Some examples of Unchecked Exceptions include null pointer exceptions, array index out of bounds exceptions, and arithmetic exceptions.
Benefits of Using Checked Exceptions
There are several benefits to using Checked Exceptions:
- Improved code readability: By requiring the programmer to handle Checked Exceptions, the code becomes more readable and easier to understand. The programmer can see at a glance which methods can throw Checked Exceptions, and they can take appropriate steps to handle them.
- Improved code reliability: By handling Checked Exceptions, the programmer can prevent the program from crashing. This makes the code more reliable and less likely to cause problems for users.
- Improved code maintainability: By separating Checked Exceptions from Unchecked Exceptions, the programmer can more easily maintain the code. The programmer can focus on handling Checked Exceptions, which are more likely to occur at runtime, and leave the Unchecked Exceptions to be handled by the JVM.
How to Handle Checked Exceptions
There are two ways to handle Checked Exceptions:
